When Garcia is tracking the location of the unsub relative to JJ and Alvez, the unsub's area code is 323 which is for Downtown LA. However, the dot marked "Jareau/Alvez" has an area code of 604 which is Metro Vancouver, Canada. The area code would likely be 703 for Quantico, VA like most phones in the show; or, if it were based on agent hometown cell numbers, 212/718 (Alvez) or 412 (Jareau).
JJ is shown with her right hand bandaged, however she holds her gun in her right hand and she grabbed the door handle with her left hand.